Even though these measures, the pump sand and the wear not ideal.

即使采取上述措施，泵的防砂和耐磨效果并不理想。

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The sand control of oil well pump is very important for drilling-production system.

抽油泵防砂是钻采系统防砂的一个重要环节。

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Otherwise, the pump may be sand or clay into.

否则，泵可能潜入沙子或粘土中。

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Otherwise, the pump may be sand or clay into.

否则，泵可能潜入沙子或粘土中。

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